Problem while attaining the coefficent of variable

IVW =

1440000*a2*a2s + 12960000*a2*a3s + 12960000*a3*a2s + 103680000*a2*a4s + 155520000*a3*a3s + 103680000*a4*a2s + 777600000*a2*a5s + 1399680000*a3*a4s + 1399680000*a4*a3s + 777600000*a5*a2s + 5598720000*a2*a6s + 11197440000*a3*a5s + 13436928000*a4*a4s + 11197440000*a5*a3s + 5598720000*a6*a2s + 83980800000*a3*a6s + 111974400000*a4*a5s + 111974400000*a5*a4s + 83980800000*a6*a3s + (6046617600000*a4*a6s)/7 + (6718464000000*a5*a5s)/7 + (6046617600000*a6*a4s)/7 + 7558272000000*a5*a6s + 7558272000000*a6*a5s + 60466176000000*a6*a6s

I used fallowing command

Eq_01 =coeffs(IVW ,a2s)

the answer i got from above command is as fallow:

[12960000*a2*a3s + 103680000*a2*a4s + 155520000*a3*a3s + 777600000*a2*a5s + 1399680000*a3*a4s + 1399680000*a4*a3s + 5598720000*a2*a6s + 11197440000*a3*a5s + 13436928000*a4*a4s + 11197440000*a5*a3s + 83980800000*a3*a6s + 111974400000*a4*a5s + 111974400000*a5*a4s + 83980800000*a6*a3s + (6046617600000*a4*a6s)/7 + (6718464000000*a5*a5s)/7 + (6046617600000*a6*a4s)/7 + 7558272000000*a5*a6s + 7558272000000*a6*a5s + 60466176000000*a6*a6s, 1440000*a2 + 12960000*a3 + 103680000*a4 + 777600000*a5 + 5598720000*a6]

My required answer as fallow

1440000*a2 + 12960000*a3 + 103680000*a4 + 777600000*a5 [phone]*a6

Answer 1

[Star Strider]

You need to specify more terms in your coeffs call. The problem is that then the polynomial separates into two separate polynomials. It is not obvious to me where that originates. In any event, ‘Eq_01(1)’ appears to be the result you want.

Try this —

syms a2 a3 a4 a5 a6 a2s a3s a4s a5s a6s
IVW = 1440000*a2*a2s + 12960000*a2*a3s + 12960000*a3*a2s + 103680000*a2*a4s + 155520000*a3*a3s + 103680000*a4*a2s + 777600000*a2*a5s + 1399680000*a3*a4s + 1399680000*a4*a3s + 777600000*a5*a2s + 5598720000*a2*a6s + 11197440000*a3*a5s + 13436928000*a4*a4s + 11197440000*a5*a3s + 5598720000*a6*a2s + 83980800000*a3*a6s + 111974400000*a4*a5s + 111974400000*a5*a4s + 83980800000*a6*a3s + (6046617600000*a4*a6s)/7 + (6718464000000*a5*a5s)/7 + (6046617600000*a6*a4s)/7 + 7558272000000*a5*a6s + 7558272000000*a6*a5s + 60466176000000*a6*a6s

IVW = 

[Eq_01, T] =coeffs(IVW , [a2s a3s a4s])

Eq_01 = 

T = 

Eq_01(1)

ans = 

Eq_01(2)

ans = 

.

[inzamam shoukat]

Thanks alot Star Strider it worked :)_

[Star Strider]

As always, my pleasure!